<!DOCTYPE html>
<html>
	<head>
		<meta charset="utf-8">
		<title></title>
		<style type="text/css">
				
			.d1{
				position: fixed;
				top: 10px;
				left: 20px;
				background: #00FFFF;
				width: 20px;
				height: 20px;
			}
			
			.d2{
				/* 要找到body 再找到html所以时根据html的边进行定位 脱离正常的文档流 */
				position: relative;
				top: 100px;
				left: 20px;
				background: #00FFFF;
				width: 200px;
				height: 200px;
			}
				
			.d3{
				position: absolute;
				bottom: 0px;
				right: 0px;
				background: #fff;
				width: 100px;
				height: 100px;
				background-image: url(https://ss1.bdstatic.com/70cFuXSh_Q1YnxGkpoWK1HF6hhy/it/u=1933440720,2469399825&fm=26&gp=0.jpg);
				background-size: 100% 100%;
			}
		</style>
	</head>
	<body>
			
		<div class="d1">
		</div>
		
		<div class="d2">
			<div class="d3"></div>
		</div>
		
	</body>
</html>
